refactor(macos): migrate to `objc2`

[pewsheen]

Issue: #1239

Roadmap

• [x] Remove objc dependency
• [x] Merge dev branch
• [x] Declare Custom Class
  • [x] WryWebView
  • [x] ~~{}URLSchemeHandler~~ (We need to create it dynamically)
  • [x] WebViewDelegate -> WryWebViewDelegate
  • [x] DocumentTitleChangedDelegate
  • [x] WryNavigationDelegate
  • [x] WryDownloadDelegate
  • [x] WebViewUIDelegate -> WryWebViewUIDelegate
  • [x] WryWebViewParent
• [ ] Test Functionality
• [ ] Update Tauri to use wry with objc2 pewsheen/refactor/wry-objc2

Functionality Test:

• [x] Window (single webview)
• [x] Window (multiple webviews)
• [x] Window iOS
• [x] PerformKeyEquivalent (menu shortcut)
• [x] Picture in picture
• [x] Fullscreen (feature = fullscreen)
• [x] Document title changed handler
• [x] Navigation Policy (download handler?)
• [x] [mac] Reparent
• [ ] UIDelegate
  • [x] File upload
  • [ ] Media capture permission
• [ ] [ios] setAllowsInlineMediaPlayback (not merged yet, in dev)
• [x] [mac] Synthetic mouse event
• [x] [mac] Tab focuses links
• [x] with_*
  • [x] [mac] with_back_forward_navigation_gestures
  • [x] with_transparent
  • [x] with_visible
  • [x] with_autoplay (false is not working, dev as well)
  • [x] with_initialization_script
  • [x] with_custom_protocol
  • [x] with_asynchronous_custom_protocol
  • [x] with_ipc_handler
  • [x] [mac] with_drag_drop_handler
  • [x] with_url_and_headers
  • [x] with_url
  • [x] with_headers
  • [x] with_html
  • [x] with_user_agent
  • [x] with_devtools
  • [x] with_navigation_handler
  • [x] with_download_started_handler
  • [x] with_download_completed_handler
  • [x] with_new_window_req_handler
  • [x] [mac] with_accept_first_mouse
  • [x] with_document_title_changed_handler
  • [x] with_incognito
  • [x] with_on_page_load_handler
  • [x] with_proxy_config (feature = mac-proxy)
  • [x] with_bounds (child webview)
• [x] pub fn
  • [x] [mac] print
  • [x] url
  • [x] load_url
  • [x] load_url_with_headers
  • [x] eval
  • [x] clear_all_browsing_data
  • [x] [mac] open_devtools
  • [x] [mac] close_devtools
  • [x] [mac] is_devtools_open
  • [x] zoom
  • [x] bounds
  • [x] [mac] set_bounds (child webview)
  • [x] set_visible
  • [x] focus
  • [x] url_from_webview
  • [x] platform_webview_version

Issues

• [ ] Async custom protocol has lifetime issue and might cause panic: https://github.com/tauri-apps/wry/pull/1316/commits/2fb6be9d6403e20540d00f90075e644b1f6ed842
• [x] (WIP) objc2-web-kit not support WKWebView on iOS. We need this so we can continue the migration.
  • https://github.com/madsmtm/objc2/issues/408
  • https://github.com/madsmtm/objc2/issues/637
• [x] Any way to catch NSException so we can recover from some situations? I'm using catch_unwind now for the exception, but I think this is not ideal.

if catch_unwind(|| {
  config_unwind_safe.setURLSchemeHandler_forURLScheme(
    Some(&*(handler_unwind_safe.cast::<ProtocolObject<dyn WKURLSchemeHandler>>())),
    &NSString::from_str(&name),
  );
})

• [x] (WIP) tauri-runtime-wry need to use objc2 as well
  • https://github.com/pewsheen/tauri/tree/refactor/wry-objc2